fix: change BaseService::reset() $initAutoloader to true by default

[kenjis]

Description
BaseService::reset(false) makes the autoloader's namespaces empty.
Such use cases are rare and will prevent lang() from working. See codeigniter4/shield#88 (comment)

• change BaseService::reset() default parameter value to true
• change CIUnitTestCase::resetServices() default parameter value to true

Checklist:

• Securely signed commits
• [] Component(s) with PHPDoc blocks, only if necessary or adds value
• [] Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[MGatner]

Changing the parameter default and behavior in a minor release worries me a little bit. I do think this is the desired behavior and is a little bit "hidden". Let's see what others think, but a compromise would be to change the default on CIUnitTestCase but not Services yet.

[kenjis]

Basically Services::reset() is also only for testing.
It is not used in normal apps.

Apps definitely need namespaces, so if it is used, it would surely be Services::reset(true).
I know only one example:
https://github.com/SDPM-lab/Codeigniter4-Roadrunner/blob/ef6752648ee90e5228ae9ab04ace41fc50f7b5d0/src/Commands/file/psr-worker.php#L136

So I think this change will not affect existing apps.

[MGatner]

All good points, I'm with you now.